package org.walden;

import javax.servlet.http.HttpServletRequest;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@SpringBootApplication
@Controller
public class GetipApplication {

	public static void main(String[] args) {
		SpringApplication.run(GetipApplication.class, args);
	}

	@ResponseBody
	@GetMapping("/ip/getip")
	public String getIp(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		System.out.println("x-forwarded-for ip: " + ip);
		if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
			// 多次反向代理后会有多个ip值，第一个ip才是真实ip
			if (ip.indexOf(",") != -1) {
				ip = ip.split(",")[0];
			}
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
			System.out.println("Proxy-Client-IP ip: " + ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
			System.out.println("WL-Proxy-Client-IP ip: " + ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_CLIENT_IP");
			System.out.println("HTTP_CLIENT_IP ip: " + ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_X_FORWARDED_FOR");
			System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("X-Real-IP");
			System.out.println("X-Real-IP ip: " + ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
			System.out.println("getRemoteAddr ip: " + ip);
		}
		System.out.println("获取客户端ip: " + ip);
		return ip;
	}
}
